Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Fri, 10 Aug 2012 15:50:12 -0500

Hi Martin,

Thanks for testing 3.15.0.1.

On 2012-08-10 Martin Konrad wrote:
> 
> Are there any changes in behaviour between 3.14.12 and 3.15.0 that can
> lead to this? Where can I find documentation about the new dependency
>  files?

Yes there are changes that cause this, but we haven't documented them (yet). 
In this case the relevant GnuMake code is found in Base/configure/RULES.Db and 
it says that if you provide a rule to generate a file named in DB you have to 
have a parallel rule that generates the associated dependency file. The main 
variables for this are DBDDEPENDS_FILES and COMMON_DBS. Dependency files are 
not new to 3.15, but we are using them more because they are essential to 
ensure that parallel builds work reliably.

In your case your .template files probably *do* have additional dependencies, 
in that changes to the replaceCmds.pl script or the cps_can.h or fpgaboards.h 
files should result in a new version of those .template files being generated. 
To tell GnuMake about such a relationship, you give it a rule to generate the 
associated DEP=.d file (which itself has a dependency on the Makefile but not 
on the .template.pre file):

can_ifc.template$(DEP): ../Makefile
	@$(RM) $@
	@echo "$(COMMONDEP_TARGET): $(DBTEMPLATES)/relaceCmds.pl" > $@
	@echo "$(COMMONDEP_TARGET): $(CAN_INCLUDE_DIR)/cps_can.h" >> $@

You can probably use pattern rules for some of your targets, like these:

llbc%.template$(DEP): ../Makefile
	@$(RM) $@
	@echo "$(COMMONDEP_TARGET): $(DBTEMPLATES)/relaceCmds.pl" > $@
	@echo "$(COMMONDEP_TARGET): $(CAN_INCLUDE_DIR)/cps_can.h" >> $@
	@echo "$(COMMONDEP_TARGET): $(CAN_INCLUDE_DIR)/fpgaboards.h" >> $@
cps%.template$(DEP): ../Makefile
	@$(RM) $@
	@echo "$(COMMONDEP_TARGET): $(DBTEMPLATES)/relaceCmds.pl" > $@
	@echo "$(COMMONDEP_TARGET): $(CAN_INCLUDE_DIR)/cps_can.h" >> $@

BTW, you do have a warning in your Make.log about linking to libCom.so.3.14.11 
which you'll probably need to resolve too.

HTH,

- Andrew
-- 
Never interrupt your enemy when he is making a mistake.
-- Napoleon Bonaparte

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System